Factorial in Php

Welcome to the Factorial in Php page! Here, you'll find the source code for this program as well as a description of how the program works.

Current Solution

<?php

$input = null;
if (
    sizeof($argv) < 2 ||
    !is_numeric($argv[1]) ||
    intval($argv[1]) < 0
) {
    echo ("Usage: please input a non-negative integer\n");
    exit(0);
}

$factorial = 1;
$input = intval($argv[1]);

for ($x = $input; $x >= 1; $x--) {
    $factorial = $factorial * $x;
}

echo ("$factorial\n");

Factorial in Php was written by:

• Italo Sousa
• Jeremy Grifski

If you see anything you'd like to change or update, please consider contributing.

How to Implement the Solution

No 'How to Implement the Solution' section available. Please consider contributing.

How to Run the Solution

No 'How to Run the Solution' section available. Please consider contributing.